数学公式

The parabolic equation can treat large angle incident waves and includes the wave energy loss with Bretchneider—Reid formula which has been verified by lots of indoor and field data, Its numerical model can simulate wave shoaling、refraction、small angle diffraction and bottom friction, and can be aplied to study the wave filed from open sea to shore area.

在抛物型缓坡方程波浪数学模型的建立过程中，采用适用于较大角度传播的基本方程，同时这一模型引入建立在较多实验和实测资料基础上的Bretchnei-der—Reid公式，较好地考虑了底摩损耗问题。该模型可同时考虑波浪的浅水变形、折射和小角度绕射，适用于大范围波浪场的推算。

The influences of the structural and movement parameters of the arc-track-type flexible holding and conveying mechanism and the sugarcane stalks geometric parameters on the conditions of sugarcane stalks outward windrowing, windrowing angle and distance were analyzed.

对甘蔗在夹持输送终点抛出后和着地时的运动学进行了理论分析，并建立了数学模型，推导出了甘蔗向外铺放的条件，以及甘蔗铺放距离、铺放角的理论计算公式，分析了圆弧轨道式柔性夹持输送装置结构参数、运动参数、甘蔗几何参数对甘蔗向外铺放、铺放距离、铺放角的相互影响规律；对甘蔗在夹持输送过程中的受力情况进行了理论分析，建立了甘蔗在夹持输送装置中所需最小夹持力模型，以及甘蔗质心距柔性夹持元件上端最大距离模型。

At present, crack propagation life analysis depends on the Paris's formula, which needs the stress intensity factor amplitude function. In the engineering, the SIF function is simplified. A new method to determinate the function is put forward.

目前的机械结构裂纹扩展寿命分析方法主要是基于Paris公式的，它需要确定应力强度因子幅值的数学表达式，工程应用采用简化方法计算求得。

It effectively solves the problem of contact mechanics between burden granules. The dynamic data structure that is a linked list is built to save and delete the varying data in simulation calculation process. Therefore, the distinct element method simulation model of charging bell-less top blast furnace is established in view of the distinct element method model of blast furnace burden granular.

本文首先对离散单元法的基本原理和数值计算方法进行了系统研究，针对高炉炉料颗粒介质特点，对离散单元法进行了相应改进，建立了高炉炉料颗粒运动的离散单元法基本数学模型，推导出了相应的高炉炉料颗粒离散单元法数值计算基本参数的计算公式，例如阻尼、刚度、时步等，并确定了合理的数值模拟参数值。

On the basis of analyzing the blasting characteristics of rock at bench top in bench blasting, the paper puts forward a calculation model of the charge for blasting top rock of the hole, and then deduces an formula for calculation of stem length of hole blasting, which is available for reference in blasting design.

在分析炮孔爆破特点的基础上，提出了计算破碎炮孔顶部岩石炸药量的计算公式，据此建立了计算炮孔堵塞长度的数学模型，可供爆破设计施工时参考。

Teacher, Shen mentioned formula replicability reasoning using mathematical methods, often with red, yellow and blue chalk in turn show the hands of this teacher, Shen, colored chalk, such as beating of the notes, images, vivid, so that we are both relaxed and learn together happy; Shen teacher also used chalk powder into the suspension liquid foam, and emulsion, the solution can be compared; to chalk on the throw, drop to indicate what is the role of inertial motion and gravity; is to compare chalk down chalk placed on the desktop Pressure Size ......

沈老师讲到公式的举一反三，在用数学方法进行推理时，往往用红、黄、蓝粉笔依次展示，沈老师手中这彩色粉笔如跳动的音符，形象、生动，使我们学起来感到既轻松又愉快；沈老师还用粉笔灰泡成悬浊液，与乳浊液、溶液进行比较；将粉笔上抛、下落来说明什么是惯性运动和重力作用；正倒放置粉笔来比较粉笔对桌面压强的大小……总之，每一节每一课，沈老师的粉笔都有妙用。

By measuring the longitudinal dispersivity α〓 of several sandy media with different grain size distribution in different transform distance L through sandy column; the formula of α〓=α〓 is obtained, this provides a method of solving scale-effect in the numerical model and in the practical application.

3通过砂柱试验测定了几种粒径分布不同的砂性介质在不同运移距离处的纵向弥散率，并得到计算不同粒径砂性介质随运移距离变化的纵向弥散率公式，在实际应用和数学模型中可作为解决尺度效应问题的一种方法

Others are said to have redundant, but many also been a time when life is not to touch the East West gourd dipper touch, follow the crowd, and even Zhi Shen, away from reality, the choice of a road, only the prospect of dazzling, this is not a mathematical problem, Is not a chemical formula, but rather a philosophy of the proposition that this proposition, we have to read it out of it, and grasp the opportunity to grasp its own life big sail, to do my own life drivers.

其他说来也都是多余的，但众多人生又何曾不是东碰葫芦西碰瓢，随波逐流，甚至于沉乿，从实际出走，选择一条道路，才有光彩夺目的前景，这不是一个数学问题，更不是一个化学公式，而是一道哲学的命题，这一命题，我们要读懂它，摆脱它，把握机遇把握自己大人生船帆，做我自己的生命的驾驶者。

Based on properties of the materials analyzed and the main reactions in high-temperature smelting process,a mathematical method was used to establish the oxidation-reduction equilibrium equation of lead button formation in fire assay.

根据分析物料的性质及在高温熔融过程中的主要反应，运用数学方法确立控制铅扣的氧化还原平衡方程式，并以此推导出几种矿物的应用公式。

From the theory of dielectric breakdown, the mathematic method was used to describe the whole course during which the dielectric captured the electric charges that was immitted by electrode.

从电介质的击穿机理出发，用数学方法描述了电极注入电荷被介质捕获的全过程，详细分析了电介质的击穿特性并得出了电击穿现象的理论公式，通过同成分铌酸锂晶体和掺锌铌酸锂晶体的极化和击穿实验对理论分析的结果进行了验证，试验现象与理论分析吻合较好。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。